#include <stdio.h>

void swap(int x, int y);

void swap(int x, int y)
{
	int temp;

	printf("In swap 互换前：x = %d,y = %d\n",x,y);

	temp = x;
	x = y;
	y = temp;	
	
	printf("In swap 互换后：x = %d,y = %d\n",x,y);
}

int main()
{
	int x = 3, y = 5;
	
	printf("In main 互换前：x = %d,y = %d\n",x,y);
	swap(x,y);
	printf("In main 互换后：x = %d,y = %d\n",x,y);
	
	return 0;	
}
